A motorboat goes 24 km in 2 hour along the stream and 10 km in 1 hour

1.	A motorboat goes 24 km in 2 hour along the stream and 10 km in 1 hour against the stream. The speed of the motorboat in kilometres per hour, is:1. 112. 103. 124. 14
Answer» Correct Answer - Option 1 : 11 Given: A motorboat goes 24 km in 2 hour along the stream and 10 km in 1 hour against the stream. Formula used: Speed of motor boat = 1/2(downstream speed + upstream speed) Calculation: Speed of motor boat along with stream(downstream speed) = distance/time ⇒ 24/2 ⇒ 12 km/hr Speed of motor boat against with stream(upstream speed) = distance/time ⇒ 10/1 ⇒ 10 km/hr According to the question, Speed of motor boat = 1/2(downstream speed + upstream speed) ⇒ (12 + 10)/2 ⇒ 11 km/hr ∴ The speed of the motorboat in kilometres per hour, is 11.

A motorboat goes 24 km in 2 hour along the stream and 10 km in 1 hour against the stream. The speed of the motorboat in kilometres per hour, is:1. 112. 103. 124. 14

Answer» Correct Answer - Option 1 : 11

Given:

A motorboat goes 24 km in 2 hour along the stream and 10 km in 1 hour against the stream.

Formula used:

Speed of motor boat = 1/2(downstream speed + upstream speed)

Calculation:

Speed of motor boat along with stream(downstream speed) = distance/time

⇒ 24/2

⇒ 12 km/hr

Speed of motor boat against with stream(upstream speed) = distance/time

⇒ 10/1

⇒ 10 km/hr

According to the question,

Speed of motor boat = 1/2(downstream speed + upstream speed)

⇒ (12 + 10)/2

⇒ 11 km/hr

∴ The speed of the motorboat in kilometres per hour, is 11.

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